get_usage() {
    cat 2>&1 << EOS
Usage: fenrisg <command>

       fenrisg help
       fenrisg version

       fenrisg rss
               <input_directory>
               <absolute_path>
               <output_file>
               <name>
               [max_entries]

       fenrisg sitemap
               <relative_path_input_directory>
               <relative_path_to_template>
               <output_file>
               <sitemap_offset_from_root>

       fenrisg <source-file>
               <relative_path_to_content>
               <relative_path_to_template>
               <relative_path_to_lua_filter>
               <template_css_class>
               <relative_hyperlink_path_to_alt_site>
               [relative_path_to_output default=output]

Commands

    help, -h, --help

            Show this usage help info.

    rss

            Build an rss feed from html metadata, sorted by date. The
            <input_directory> should not have a trailing / char.

    sitemap

            Build a sitemap.

    version, -v, --version

            Display the current version.

    <source-file>

            The format to convert to html followed by positional args.

            Formats allowed: org, markdown, markdown-smart
EOS
}
